package com.atguigu.springcloud.controller;


import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {


    //public static final String PAYMENT_URL = "http://localhost:8001";
    public static final String PAYMENT_URL="http://CLOUD-PROVIDER-PAYMENT8001";


    @Resource
    private RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id")Long id){
        log.info("查询成功"+id);
        return restTemplate.getForObject(PAYMENT_URL+"/payment/getPaymentById/"+id,CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getForEntity(@PathVariable("id")Long id){
        log.info("getforentity使用");
        ResponseEntity<CommonResult> forEntity = restTemplate.getForEntity(PAYMENT_URL + "/payment/getPaymentById/" + id, CommonResult.class);
        if(forEntity.getStatusCode().is2xxSuccessful()){
            log.info("Payment"+forEntity.getHeaders()+" "+forEntity.getStatusCodeValue());
            return forEntity.getBody();
        }else {
            return new CommonResult<>(444,"操作失败");
        }
    }


    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB(){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PROVIDER-PAYMENT8001");
        if(instances==null||instances.size()<=0){
            return null;
        }
        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

}
